> Can I only redraw partial of the window by use damage(FL_DAMAGE_EXPOSE, x,
> y, w, h)? I have tried to use this function, but found that it redraw of
> the window? Why? And how can I only redraw partial of the window region?


Can you describe more fully what you are trying to do, and what host system you 
are running on?

It may be possible to limit what is redrawn, but FL_DAMAGE_EXPOSE may not be 
what you want. You possibly want to look at how the clip stack is set up, that 
may be closer?

You probably will also need to provide a custom draw() method that makes sure 
only the regions you want are redrawn.

So... it you can outline your objective in detail, we can see how you might 
achieve that.




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